An Attempt To Attach An Auto-named Database For File...failed. A Database With The Same Name Exists, Or Specified File Cannot Be

I know allot of folks are having this problem and I tried lots of things but nothing works. I understand the problem is coping the SQL Express on another server is the problem - I just not sure what to do?

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

This is the last statement on the Stack Trace:

SqlException (0x80131904): An attempt to attach an auto-named database for file e:wwwdata81d0493fwwwApp_DataTestDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +735091

I checked my server forum and they said I had to name a database:
Example: Database=(unique name);

But this didn't work either.

I just tried a simple web project that has only one database and one table in SQL Express with one sqldatasource and one datagrid. It works fine on my pc but when I use the copy function in Visio Studio 2005 Pro - I can't run the site on the remote server: www.myjewelrydirect.com

I tried coping the database manually. I tried disconnecting the database before I copy it. Below is my connection statement:

<connectionStrings>
<add name="TestDB" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|TestDatabase.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>

With all the comments in these forums - this must be a bug.

I have been working on this problem for over 2 weeks - HELP!